I would rather stay home then have to share one room and one bathroom with 5 people while on vacation. We always do two bedrooms when all 5 of us go and 1 bedrooms usually when it is just DH and I. Studios are too cramped and we like the full kitchen for beverages and snacks. I even occasionally cook spaghetti for diner if we don't feel like going anywhere and eat by the pool.
We own both BWV and BRV, but spend way more time at BWV. Our kids were about your kids age when we bought 15 years ago. Epcot is now their favorite parka and DHS is second. With banking and borrowing you can pull off a two bedroom at BWV for not too many points. That gives you off years to go someplace else to get a Disney break.
Good luck with your decision.
I own DVC now, but these kind of comments make me realise how much things have changed! Vacation for me when I was younger was 4 of us in a small tent and a bathroom shared with 50.

We are fortunate enough to be able to book one bedrooms sometimes now, but that doesn't make any of our other trips any less fun.